The pregnancy and “cervical dilation and evacuation,” which is a technical term for abortion, that she received at the Planned Parenthood clinic, 18 S. Michigan Ave. were listed as contributing factors in her death.

The victim’s twin sister told WBBM Newsradio that her family is demanding answers.

“It happened so fast,” said Toni Reaves. “She was just fine one day -- and then the next day she was gone. We’re just trying to figure out what happened.”

When reached Sunday night, Reaves’ family declined to comment further.

In a statement, Planned Parenthood of Illinois President and CEO Carole Brite offered condolences.

“While legal abortion services in the United States have a very high safety record, a tragedy such as this is devastating to loved ones and we offer our deepest sympathies,” Brite said. “Planned Parenthood of Illinois cares deeply about the health and safety of each and every patient.”

Less than 0.3 percent of abortion patients experience complications that require hospitalization, according to the Guttmacher Institute, a pro-abortion rights group that focuses on sexual and reproductive health research.